Lamp holder



FIG. 1 is a perspective view of a lamp holder showing the new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a rear elevation view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a top plan view thereof. 

CLAIM The ornamental design for a lamp holder, as shown and described. 